Pipe-wrench.



H. H. KENT.

PIPE WRENCH.

APPLICATION EILED JUNE 11, 1915.

LQWJYM o Patented Oct. 24,1916.

HENRY H. KENT, SEATTLE, WASHINGTON.

PIPE-WRENCH.

Application filed June 11, 1915.

To all whom it may concern:

Be it known that I, HENRY'H. KENT, a citizen of the United States, residing at Seattle, in the county of King and State of lVashington, have invented certain new and useful Improvements in Pipe-Wrenches; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

The invention relates to improvements in pipe wrenches.

The invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the claims hereto appended, it being understood that various changes in the form, proportion and minor details of construction may be resorted to without departing from the spirit or sacrificing any of the advantages of the invention.

In the drawing Figure 1 is a side elevation of a pipe wrench constructed in accordance with this invention, Fig. 2 is a longitudinal sectional view of a portion of the same, Fig. 3 is a detail view illustrating another form of jaw having a straight toothed engaging face, Fi t is a similar view showing a jaw with a curved toothed engaging face, Fig. 5 is a fragmentary view of the fixed jaw showing the spaced flanges which form a part thereof, Fig. 6 is a perspective view of the locking bolt.

Like numerals of reference designate corresponding parts in all the figures of the drawing.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention, 1 designates a bar or lever provided at the inner end with a handle 2 and having a relatively fixed jaw 3 at the outer end to co'c'perate with a movable jaw t.

' The handle 2 which may be constructed of wood or other suitable material is mounted on the shank portion 5 of the bar or lever in the usual manner but any other form of handle may of course be employed whether separate from or integral with the bar or lever 1. The bar or lever 1 is provided at its front and rear edges with screw threads 6 and has flat side faces and slidably receives a casing 7. The casing 7 which has a smooth longitudinal opening 8 for the passage of the lever is also provided with a Specification of Letters Patent.

Patented Got. 24, 1916,

Serial No. 33,570.

transverse opening 9 for the reception of a nut 10 mounted for rotary movement on the threaded portion of the bar or lever and adapted to engage the threads thereof to move the casing inwardly and outwardly along the said bar or lever. The nut 10 which has interior screw threads 11 is also milled, checkered or otherwise roughened at its outer face to enable it to be readily grasped and rotated in adjusting the wrench.

The fixed jaw 3 of the bar or lever 1 has a straight outer toothed engaging face 12 and it is provided at the back with spaced rearwardly projecting guide flanges 13 which receive the shank letof the jaw 4. which is pivoted at the inner or rear terminal of the shank 14f between rearwardly projecting cars 15 of the casing. The inner or rear end 16 of the shank 1% is preferably enlarged and rounded to form an eye through which passes a bolt 17 which is also arranged in the rearwardly projecting ears 15. The bolt is preferably provided adjacent to its head with a lug 18 to prevent rotary movement of the bolt and unloosening of the nut through the pivotal or oscillatory movement of the shank 1st. The jaw 3 is provided at the back with a pair of rearwart ly extending flanges 19 arranged in parallelism and spaced apart to form-a guide for the shank let to assist in supporting the same and to prevent any lateral or twisting movement. The flanges and the manner of mounting the shank are adapted to relieve the threads of the wrench of strain and in this manner the durability thereof is materially increased.

The jaw l is provided with pipe engaging faces 20, and 21 to cooperate with the toothed pipe engaging face 12 and while the faces 20 and 21 are shown toothed and the face 22 plain, all may be either plain or toothed as desired. The plurality of pipe engaging faces are adapted to distribute the strain and prevent the crushing of a thin weak pipe.

In Fig. 3 of the drawing is illustrated a movable jaw 28 having a straight toothed pipe engaging face 24 while the jaw 25 illustrated in Fig. l of the drawings is provided with a curved face having teeth 26. The jaws 24 and 25 are designed for engaging pipes of relatively large diameters but the wrench may be made of course of any size. The inner end 16 of the shank 14: is

provided with a plurality of teeth 27 which are adapted to be engaged by teeth 28 of a dog 29. The dog which is mounted on a transverse pivot 30 has a projecting grip portion 31 and is normally maintained in its engaging position by a spring 32 secured to the dog beneath the grip portion thereof and bearing against the casing at the back of the same between the projecting ears 15.

The dog is adapted to be depressed by the operator and the teeth are arranged to hold the movable jaw either in its closed position as illustrated in Fig. 2 of the drawing or in an open position. When the jaws are open and the dog is depressed, it will permit the lever to drop into engagement with the pipe or ether object to be operated on.

What is claimed is V 1. A wrench of the class described including a shank having a fixed jaw at one end and threads on its front and rear sides, guide flanges formed on and extending rearwardly from the fixed jaw, a casing slidable on the shank of the fixed jaw, a nut carried by thecasing and engaging the threaded portion of the shank, a movable jaw having a shank resting between the guides of the fixed jaw and pivoted to the rear portion of the casing, and a pawl also mounted on the casing and engaging the rear ends of the shank of the movable jaw.

22. A wrench of the class described including a shank having a fixed jaw at one end and provided with threads on its front and rear sides, a casing slidably and adjustably Copies of this patent may be obtained for five cents each,

mounted on the shank, a movable jaw provided with a shank pivoted to the casing, the inner end of the shank of the movable jaw provided with teeth, a pawl pivotally mounted in the casing arranged to engage the teeth of the shank for holding the same in an open or closed position, and means carried by said casing for engaging the threads of the shank for holding said casing adjusted with relation upon said shank, substantially as set forth.

3. A wrench of the class described including a shank having threads on its front and rear sides, and a fixed jaw on one end of said shank, rearwardly extending guides formed on said fixed jaw, a casing slidably mounted on said shank, a nut carried by the casing and engaging the threaded portion of said shank, rearwardly extending arms formed en said casing and in direct alinement with the guide of said fixed jaw, a movable jaw having a shank, said shank resting between the guides of the fixed jaw and its rear end pivotally mounted in the arms of the casing, a pawl pivotally mounted between the arms of said casing engaging the rear end of said shank and to hold the same in an open or closed position.

In testimony whereof I aflix my signature in presence of two witnesses.

I HENRY H. KENT.

Witnesses:

F. W. BARKER, J J. Goss.

by addressing the Commissioner of Patents,

Washington, D. C. 

